Certified Rhythm Analysis Technician (CRAT) Practice Exam

Question: 1 / 400

Small or non-existent diastolic pause is associated with which condition?

Sinus rhythm

Sinus bradycardia

Sinus tachycardia

A small or non-existent diastolic pause is typically associated with sinus tachycardia. In this condition, the heart rate exceeds the normal range, which leads to reduced time for diastole, or the heart's relaxation phase. During sinus tachycardia, the rapid heart rate does not allow for a sufficient diastolic pause, as the atria and ventricles do not get enough time to fill with blood before the next heartbeat occurs.

In contrast, sinus rhythm, sinus bradycardia, and sinus arrest may exhibit more pronounced diastolic pauses, particularly sinus bradycardia where the heart rate is slower and there is more time available for the heart to relax between beats. Sinus arrest involves the absence of sinus node activity for a period, resulting in a more significant interruption in normal heart rhythm, including extended pauses. Thus, recognizing the behavior of the heart during these various conditions is crucial for accurate rhythm analysis.

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Sinus arrest

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